问题 选择题 算一算，选择正确的得数。( ) 1. six + two =( ) 2. five + one =( ) 3. one + nine =( ) 4. seven + two =( ) 5. three + four =A. nineB. sixC. eightD. tenE. seven 答案 1. C 2. B 3. D 4. A 5. E
